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Posted: 8/10/2011 6:29:50 PM EDT
[#1]
Maybe the fan was running in "defrost" mode?
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Posted: 8/10/2011 6:32:48 PM EDT
[#2]
Quoted:
Well I noticed the house was a little warm the other morning. I had the unit freeze up a couple years ago from it being so hot and continuously running. <snip> The unit shouldn't freeze up from continuous running if it is anywhere close to the right size, and is properly maintained. You are either 1. low on refrigerant (most likely) or 2. borderline on refrigerant with a very clogged air filter. Check the filter first if you haven't; it's the two dollar fix if it works. I'm betting on the low refrigerant, though ("low freon" is the usual term). |
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Posted: 8/10/2011 6:33:22 PM EDT
[#3]
Is it your condenser coil (outside) or your evaporator coil (inside) that's freezing up? Is it a heat pump unit?
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Posted: 8/10/2011 6:41:39 PM EDT
[#4]
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Posted: 8/10/2011 6:46:09 PM EDT
[#5]
a/c or heatpump?
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Posted: 8/10/2011 6:51:42 PM EDT
[#6]
Sounds like a contactor that has welded contacts. The condensing unit will run even after it reaches indoor temp and indoor fan shuts off. This will cause the evap to freeze because of no airflow. It's an easy fix, just pick up a new contactor.
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Posted: 8/10/2011 6:53:13 PM EDT
[#7]
You have either a stuck Contactor or a Blown Capacitor. I am a 15 year career HVAC tech.
- If there is NO thermostat calling for AC, and just the fan is running, your Contactor has burnt points, and has stuck closed. - IF there IS a thermostat call for AC, and the fan is running, then MOST LIKELY the Hermetic(compressor) side of the capacitor is blown - Another possibility is the compressor winding has opened up on thermal overload. |
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Posted: 8/10/2011 7:05:44 PM EDT
[#8]
contactor & capacitor
same thing happened to me last weekend |
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Posted: 8/11/2011 12:07:00 AM EDT
[#9]
It is the outside unit that is continuing to run.
The house is 18 years old and I've owned it for 10. Had an issue about 3-4 years ago and the guy said low freon. Of course he said it was a leak and quoted me a price to replace the whole unit..... 
I chose the cheaper option and had him fill the freon...... It's run like a top for the last 3-4 years 
Maybe it's time for the same service again....? How often should I have the unit serviced? I know some companies say twice a year but I always kinda figured that was them generating business...... |
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Posted: 8/11/2011 4:04:32 AM EDT
[#10]
Since you know you have a leak, you need to have it looked at once a year. The freezing up is due to the level of freon in your system. Combine that with a dirty air filter/coil and it will freeze up more frequently.
My guess is you are about 2lbs low, and you have a stuck contactor. |
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Posted: 8/11/2011 4:14:36 AM EDT
[#11]
I'll bet the inside of the coil has enough dirt and hair to just peel it right off...........total blockage...
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